Haery whittingham



H. WHITTINGHAM.

Hot Air Furnace. I

No. 57,027. Pate rited Aug. 7, 1866i 65 ea. 1710271 2L0? Z44 ff. lam/ 11M N. PETERS, PhumLiiha n her. Wnhin wn. u. c

PATENT OFFICE.

HARRY WHITTINGHAM, OF NEW YORK, N. Y.

HOT-AIR FURNACE.

Specification forming part of Letters Patent No. 57,027, dated August 7,1866.

To all whom it may concern:

Be it known that I, HARRY WHITTINGHAM, of the city, county. and State ofNew York, have invented a new and Improved Hot-Air Furnace and I dohereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art to makeand use the same, reference being had to the accompanying drawingsforming part of this specification, in which Figure 1 represents ahorizontal section of this invention taken in the plane indicated by theline 00 m, Fig. 2. Fig. 2 is a central vertical section of the same.Fig. 3 is a plan or top View of the same.

Similar letters of reference indicate like parts.

This invention consists in a hot-air furnace in which the heatedproducts of combustion are concentrated in a cone which is above thefireplace and inclosed in a cylindrical drum in such a manner that agreat radiating-surface is obtained and the heat is forced against theair-pipes. The air pipes extend below the heating-drum, so that theentrance of the cold air into the same is facilitated and the heatradiating from the fire-pot is utilized. An annular evaporator issecured to the inner surface of the jacket which surrounds theheating-drum, and supplied with water from a suit able supplytank insuch a manner that a large evaporating-surface for the water is obtainedand the hot air arising from the furnace is supplied with the requisitequantity of moisture.

A represents the fire'pot of my hot-air furnace, to which the fuel isintroduced through the throat B, which passes through the outer shell,E, the jacket D, and the heating-drum E.

The interior of the heating-drum is occupied by a cone, F, which issurrounded by a cylinder, Gr, and the heated products of combustion, asthey rise from the fire-pot, are concentrated in said cone, and the heatis radiated with great intensity and forced against the air-pipes H.

The cylinder G is open at the top and it is supplied with air'through apipe, 0, which extends through the heatingdrum to the space between saiddrum and the jacket D, which is supplied with air through suitableapertures in the bottom plate of the furnace.

The airpipes H pass up through. the heating-drum, and they extend belowthe bottom of the same, so that the external air finds ready access tothe same, and, furthermore, the heat radiating from the fire-pot isutilized in heating the lower parts of the air-pipes.

The smoke or products of combustion pass off through a pipe, I), whichextends from the drum E through the jacket D and the outer shell, 0.

I is an annular evaporator, which is secured to the inner surface of thejacket 1), and extends close to the heating-drum E, as clearly shown inFig. 1 of the drawings. This evaporator extends all round theheating-drum, and

itis supplied with water through a pipe, 0, which extends throughthejacket l) and outer shell,

O, to a suitable supply-tank, J. v Fromthe annular evaporator rise smallpipes d into the hot-air dischargepipes e, and the hot air passing upthrough said discharge-pipes is thus supplied with the requisitequantity of moisture, and the injurious effect of the heated air isprevented. l

The outer shell, 0, prevents the cold external air from coming in directcontact with the jacket D so as to prevent a waste of heat.

By these means a hot-air furnace is obtained which, with a comparativelysmall quantity of fuel, produces a large quantity of heated air, andwhich can be made cheap and durable.

vWhat I claim as new, and desire to secure by Letters Patent, is

l. The cone F, in combination with the firepot A, drum E, and air-pipesH, constructed and operating substantially as and for the purpose setforth.

2. In combination with the above, extending the air-pipes H through thebottom of the heating-drum, substantially as and for the purposedescribed.

3. The annular evaporator I, in combination with the jacket D andheating-drum E, constructed and operating substantially as'and for thepurpose set forth.

HARRY WHITTINGHAM.

Witnesses:

WM. F. MCNAMARA, ALEX. F. ROBERTS.

